nationalist vs advocator

nationalist and advocator both are nouns.

Word	Noun	Adjective	Verb	Adverb
nationalist	Yes	Yes	No	No
advocator	Yes	No	No	No

As nouns, advocator is a hypernym of nationalist; that is, advocator is a word with a broader meaning than nationalist:

nationalist: an advocate of national independence of or a strong national government
advocator: a person who pleads for a cause or propounds an idea

Other hypernyms of nationalist include advocate, exponent, proponent.

nationalist (noun)	advocator (noun)
one who loves and defends his or her country	a person who pleads for a cause or propounds an idea
an advocate of national independence of or a strong national government

nationalist (adjective)	advocator (adjective)
devotion to the interests or culture of a particular nation including promoting the interests of one country over those of others